Elon Musk says Twitter is removing accounts that have been inactive for several years.
The CEO of Twitter's parent firm issued a tweet on Monday. He said, "We're purging accounts that have had no activity at all for several years." He added that users will probably see a drop in their follower counts.
Twitter says users should log in at least every 30 days to prevent their accounts from being deleted.
Media outlets say the policy has raised concerns from people who regularly read tweets posted in the past by their late loved ones. Those people reportedly want the accounts preserved.
Musk had earlier suggested that idle accounts would be removed last December. He said the move would free up the namespace of 1.5 billion accounts.
Some US media outlets have said that Twitter is considering selling popular usernames to generate additional revenue.